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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package compiler.lib.ir_framework.driver.irmatching.parser.hotspot;

import compiler.lib.ir_framework.TestFramework;

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * This class keeps track of all {@link WriterThread} instances.
 */
class WriterThreads {
    private final Map<Integer, WriterThread> mapIdToThread = new HashMap<>();

    WriterThread parse(String line) {
        int writerThreadId = parseWriterThreadId(line);
        return mapIdToThread.computeIfAbsent(writerThreadId, c -> new WriterThread());
    }

    private static int parseWriterThreadId(String line) {
        Pattern pattern = Pattern.compile("='(\\d+)'");
        Matcher matcher = pattern.matcher(line);
        TestFramework.check(matcher.find(), "should find writer thread id");
        return Integer.parseInt(matcher.group(1));
    }
}
